Ori.nz Kaleidoscope (Drag & Drop)

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</script>

<!-- thought this was sourced from https://codepen.io/Ra1ny/pen/aEbmq ...its not -->
<script type="text/javascript">
(function() {
var DragDrop, HashNavigation, Kaleidoscope, c, cyclePos, dragger, gui, hash, i, image, imagesPath, kaleidoscope, len, onChange, onResize, onMouseMoved, options, presetImages, ref, sameImageCycles, startAnimation, toggleInteractive, tr, tx, ty, update,
  bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

  function calculateRadius() {
  return Math.max(document.documentElement.clientWidth, window.innerWidth, document.documentElement.clientHeight, window.innerHeight) / 2 + (Math.max(document.documentElement.clientWidth, window.innerWidth, document.documentElement.clientHeight, window.innerHeight) / 10);
}

Kaleidoscope = (function() {
  Kaleidoscope.prototype.HALF_PI = Math.PI / 2;
  Kaleidoscope.prototype.TWO_PI = Math.PI * 2;

  Kaleidoscope.prototype.calculateRadius = function() {
    this.viewportWidth = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
    this.viewportHeight = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
    return Math.sqrt(Math.pow(this.viewportWidth / 2, 2) + Math.pow(this.viewportHeight / 2, 2));
  };


  function Kaleidoscope(options1) {
    var key, ref, ref1, val;
    this.options = options1 != null ? options1 : {};
    this.defaults = {
      offsetRotation: 0.0,
      offsetScale: 1.0,
      offsetX: 0.0,
      offsetY: 0.0,
      radius: this.calculateRadius(),
      slices: 28,
      zoom: 1.0
    };
    ref = this.defaults;
    for (key in ref) {
      val = ref[key];
      this[key] = val;
    }
    ref1 = this.options;
    for (key in ref1) {
      val = ref1[key];
      this[key] = val;
    }
    if (this.domElement == null) {
      this.domElement = document.createElement('canvas');
    }
    if (this.context == null) {
      this.context = this.domElement.getContext('2d');
    }
    if (this.image == null) {
      this.image = document.createElement('img');
    }

  }


  Kaleidoscope.prototype.draw = function() {
    var cx, i, index, ref, results, scale, step;
    this.domElement.width = this.domElement.height = this.radius * 2;
    this.context.fillStyle = this.context.createPattern(this.image, 'repeat');
    scale = this.zoom * (this.radius / Math.min(this.image.width, this.image.height));
    step = this.TWO_PI / this.slices;
    cx = this.image.width / 2;
    results = [];
    for (index = i = 0, ref = this.slices; 0 <= ref ? i <= ref : i >= ref; index = 0 <= ref ? ++i : --i) {
      this.context.save();
      this.context.translate(this.radius, this.radius);
      this.context.rotate(index * step);
      this.context.beginPath();
      this.context.moveTo(-0.5, -0.5);
      this.context.arc(0, 0, this.radius, step * -0.51, step * 0.51);
      this.context.lineTo(0.5, 0.5);
      this.context.closePath();
      this.context.rotate(this.HALF_PI);
      this.context.scale([-1, 1][index % 2], 1);
      this.context.translate(this.offsetX - cx, this.offsetY);
      this.context.rotate(this.offsetRotation);
      this.context.scale(this.offsetScale, this.offsetScale);
      this.context.fill();
      results.push(this.context.restore());
    }
    return results;
  };

  return Kaleidoscope;

})();

DragDrop = (function() {
  function DragDrop(callback, context, filter) {
    var disable;
    this.callback = callback;
    this.context = context != null ? context : document;
    this.filter = filter != null ? filter : /^image/i;
    this.onDrop = bind(this.onDrop, this);
    disable = function(event) {
      event.stopPropagation();
      return event.preventDefault();
    };
    this.context.addEventListener('dragleave', disable);
    this.context.addEventListener('dragenter', disable);
    this.context.addEventListener('dragover', disable);
    this.context.addEventListener('drop', this.onDrop, false);
  }

  DragDrop.prototype.onDrop = function(event) {
    var file, reader;
    event.stopPropagation();
    event.preventDefault();
    file = event.dataTransfer.files[0];
    if (this.filter.test(file.type)) {
      reader = new FileReader;
      reader.onload = (function(_this) {
        return function(event) {
          return typeof _this.callback === "function" ? _this.callback(event.target.result) : void 0;
        };
      })(this);
      return reader.readAsDataURL(file);
    }
  };

  return DragDrop;

})();

HashNavigation = (function() {
  function HashNavigation() {
    this.vals = document.location.hash.replace('#/', '').replace('#', '').split('/');
  }

  HashNavigation.prototype.getVal = function(index) {
    return this.vals[this.vals.indexOf(index) + 1];
  };

  return HashNavigation;

})();

imagesPath = ''; // https://web.archive.org/web/20170406084024/http://http://apps.gordeenko.com/Kaleidoscope/images/

// presetImages = ['https://ori.nz/stuff/Yellow-Theme-Plants.jpg','https://ori.nz/stuff/Paisley-Williamsburg-Jaipur-Fabric.jpg','https://ori.nz/stuff/ekiselev-the-city-on-Flickr.jpg'];

fetch('https://pix.ori.nz/ws.php?format=json&method=pwg.categories.getImages&cat_id=11')
  .then(response => response.json())
  .then(data => {
    const images = data.result.images;
    images.sort(() => Math.random() - 0.5);
    presetImages = [];
    // images.forEach(image => {console.log(image.element_url);});
    images.forEach(image => {
      presetImages.push(image.element_url);
    });
    image.src = presetImages[0];
    kaleidoscope.nextImage;
    // console.log(presetImages);
  })
  .catch(error => console.error('Error:', error));

image = new Image;

image.onload = (function(_this) {
  return function() {
    return kaleidoscope.draw();
  };
})(this);

// image.src = imagesPath + presetImages[0];

kaleidoscope = new Kaleidoscope({
  image: image,
  slices: 28
});

kaleidoscope.domElement.style.position = 'absolute';

kaleidoscope.domElement.style.marginLeft = -kaleidoscope.radius + 'px';

kaleidoscope.domElement.style.marginTop = -kaleidoscope.radius + 'px';

kaleidoscope.domElement.style.left = '50%';

kaleidoscope.domElement.style.top = '50%';

document.body.appendChild(kaleidoscope.domElement);

dragger = new DragDrop(function(data) {
  return kaleidoscope.image.src = data;
});

tx = kaleidoscope.offsetX;

ty = kaleidoscope.offsetY;

tr = kaleidoscope.offsetRotation;

options = {
  interactive: true,
  animate: true,
  reverse: false,
  cycleImages: false,
  cycleOffset: true,
  ease: 0.1,
  animationSpeed: 1.0
};

onMouseMoved = (function(_this) {
  return function(event) {
    if (options.interactive) {
      tx = event.pageX;
      return tr = Math.atan2(tx, ty);
    }
  };
})(this);

(startAnimation = (function(_this) {
  return function() {
    if (options.animate) {
      if (options.reverse) {
        ty += options.animationSpeed;
      } else {
        ty -= options.animationSpeed;
      }
    }
    return setTimeout(startAnimation, 1000 / 60);
  };
})(this))();

document.querySelector('canvas').addEventListener('mousemove', onMouseMoved, false);

toggleInteractive = (function(_this) {
  return function() {
    return options.interactive = options.interactive === false;
  };
})(this);

document.querySelector('canvas').addEventListener('click', toggleInteractive, false);

(update = (function(_this) {
  return function() {
    var delta, theta;
    delta = tr - kaleidoscope.offsetRotation;
    theta = Math.atan2(Math.sin(delta), Math.cos(delta));
    kaleidoscope.offsetX += (tx - kaleidoscope.offsetX) * options.ease;
    kaleidoscope.offsetY += (ty - kaleidoscope.offsetY) * options.ease;
    kaleidoscope.offsetRotation += (theta - kaleidoscope.offsetRotation) * options.ease;
    kaleidoscope.draw();
    return setTimeout(update, 1000 / 60);
  };
})(this))();

sameImageCycles = 1;

(cyclePos = (function(_this) {
  return function() {
    if (options.cycleOffset) {
      tx += 100;
      if (sameImageCycles++ > 2) {
        sameImageCycles = 1;
        if (options.cycleImages) {
          image.src = imagesPath + presetImages[Math.round(Math.random() * presetImages.length)];
        }
      }
    }
    return setTimeout(cyclePos, 1000 * 60);
  };
})(this))();

kaleidoscope.nextImage = (function(_this) {
  return function() {
    var currentImage, currentImageFile, nextImagePath;
    currentImageFile = image.src.replace(imagesPath, "");
    currentImage = presetImages.indexOf(currentImageFile);
    if (currentImage === presetImages.length - 1) {
      nextImagePath = presetImages[0];
    } else {
      nextImagePath = presetImages[currentImage + 1];
    }
    return kaleidoscope.image.src = imagesPath + nextImagePath;
  };
})(this);
kaleidoscope.prevImage = (function(_this) {
  return function() {
    var currentImage, currentImageFile, nextImagePath;
    currentImageFile = image.src.replace(imagesPath, "");
    currentImage = presetImages.indexOf(currentImageFile);
    if (currentImage === 0) {
      prevImagePath = presetImages[presetImages.length - 1];
    } else {
      prevImagePath = presetImages[currentImage - 1];
    }
    return kaleidoscope.image.src = imagesPath + prevImagePath;
  };
})(this);

gui = new dat.GUI;

gui.add(kaleidoscope, 'slices').min(6).max(50).step(2);

gui.add(kaleidoscope, 'offsetScale').min(0.2).max(3.0);

gui.add(options, 'animationSpeed').min(0.1).max(5.0);

gui.add(options, 'animate');

gui.add(options, 'cycleImages');

gui.add(options, 'cycleOffset');

gui.add(options, 'reverse');

gui.add(kaleidoscope, 'nextImage');

gui.close();

onChange = window.onresize = (function(_this) {
  return function() {
    kaleidoscope.radius = kaleidoscope.calculateRadius();
    kaleidoscope.domElement.style.marginLeft = -kaleidoscope.radius + 'px';
    kaleidoscope.domElement.style.marginTop = -kaleidoscope.radius + 'px';
    options.interactive = false;
    return kaleidoscope.draw();
  };
})(this);

ref = gui.__controllers;
for (i = 0, len = ref.length; i < len; i++) {
  c = ref[i];
  if (c.property !== 'interactive') {
    c.onChange(onChange);
  }
}

document.addEventListener('keydown', function(event) {
  if (event.keyCode === 34) {
    kaleidoscope.nextImage();
  }
  if (event.keyCode === 33) {
    kaleidoscope.prevImage();
  }
});

hash = new HashNavigation();

if (hash.getVal('hideControls') === 'true') {
  dat.GUI.toggleHide();
}

}).call(this);
</script>